Electron | MCQs

Explanation

A rectifier is an electrical device that converts Alternating Current (AC) into Direct Current (DC).

It works by allowing current to flow only in one direction using diodes.

Explanation

The component of an electric circuit that opposes the flow of charges in the circuit is called a resistor.

Explanation

The invention and advancement of the vacuum or electron tube marked the beginning of the Electronic Era in the early 20th century.

These tubes were used in early radios, televisions, and computers.

Explanation

The ePay app is used for paying utility bills and taxes.

It is a digital payment platform that allows users to make payments for services like electricity, gas, water, and other government taxes.

Explanation

A switch is used to control the On/Off state of an electrical circuit.

It allowing current to flow or stopping it when needed.

Explanation

ENIAC was designed by John Mauchly and J. Presper Eckert

ENIAC was completed in 1945

It was first put to work for practical purposes on December 10, 1945

Explanation

A rectifier is an electrical device that converts alternating current (AC),

which periodically reverses direction, to direct current (DC), which flows in only one direction.

Explanation

Digital media is used to transmit information in the form of binary data (0s and 1s) in electronic devices.

It includes texts, images, audio, and video transmitted through digital signals.

Explanation

 A camcorder is a portable electronic device that combines a video camera and a video recorder.

It is used for recording videos along with sound.

Explanation

Thermionic emission is the process by which electrons are emitted from a hot metal surface.

This occurs when a metal is heated to a high temperature, causing the electrons to gain enough energy to escape from the metal's surface.

This process is also known as thermal electron emission or Edison effect.